If you don't want to spend money you could try DIY it but if someone will show you how to use tools for introspective like journaling and emotional averness it will be much easier to start.
You wrote in other comment that:
I want to be busy.
Maybe you should do the opposite. Be bored and see what your mind will do with boredom. Try to do it for a decent about of time like an hour. Maybe you will discover something surprising about yourself.
You can use windows in indefinite trial version with Activate Windows watermark.
Grab a windows iso from the website. Put it on USB stick (I use Ventoy). And install. I would keep windows bootlaoder and grub on separate partitions.
Jestem rodowitym Polakiem i moim ojczystym językiem jest polski.
I use english so much everyday that I begin to forget how to write in my native langauge.
я училсья руский язык в школье. Я умею болше читать чем писять.
私の日本語は大丈夫じやないです。